Phanpy's movepool quite honestly changes a very slight amount. It gets the new teachable moves Tantrum and Mudshot but that's pretty much it. Donphan has some changes that are slightly worth noticing. For starters lvl 60 provides it with the devestating new move Overturn which can be a real game changer if used at the right time. It also gets Refresher, the new fighting mover, and Snarl to add to its teachables.